<template>
	<view v-if="goods_info.goods_name" class="goods-detail-container">
    <!-- 轮播图区域 -->
		<swiper :indicator-dots="true" :autoplay="true" :interval="3000" :duration="1000" :circular="true">
		  <swiper-item v-for="(item, i) in goods_info.pics" :key="i">
		    <image :src="item.pics_big" @click="preview(i)"></image>
		  </swiper-item>
		</swiper>
    
    <!-- 商品信息区域 -->
    <view class="goods-info-box">
      <!-- 商品价格 -->
      <view class="price">¥{{goods_info.goods_price}}</view>
      <!-- 商品信息主体区域 -->
      <view class="goods-info-body">
        <!-- 商品的名字 -->
        <view class="goods-name">{{goods_info.goods_name}}</view>
        <!-- 收藏 -->
        <view class="favi">
          <uni-icons type="star" size="18" color=gray></uni-icons>
          <text>收藏</text>
        </view>
      </view>
      <!-- 运费 -->
      <view class="yf">
        快递: 免运费
      </view>
    </view>
    
    <rich-text :nodes="goods_info.goods_introduce"></rich-text>
    
    <!-- 商品导航区域 -->
    <view class="goods_nav">
      <uni-goods-nav :fill="true"  :options="options" :buttonGroup="buttonGroup"  @click="onClick" @buttonClick="buttonClick" />
    </view>
	</view>
</template>

<script>
  import {mapState,mapMutations,mapGetters} from 'vuex'
	export default {
    computed: {
      ...mapState('m_cart',[]),
      ...mapGetters('m_cart',['total'])
    },
    watch: {
      // total(newVal) {
      //   const findResult = this.options.find(x => x.text === '购物车')
      //   if (findResult) {
      //     findResult.info = newVal
      //   }
      // }
      
      // 1. 监听 total 值的变化，通过第一个形参得到变化后的新值
      total: {
         // handler 属性用来定义侦听器的 function 处理函数
        handler(newVal) {
          const findResult = this.options.find(x => x.text === '购物车')
          if(findResult) {
            findResult.info = newVal
          }
        },
       // immediate 属性用来声明此侦听器，是否在页面初次加载完毕后立即调用
        immediate: true
      }
    },
    
		data() {
			return {
        goods_info: {},
        options: [{
        			icon: 'shop',
        			text: '店铺',
        			info: 0,
        			infoBackgroundColor:'#007aff',
        			infoColor:"red"
        		}, {
        			icon: 'cart',
        			text: '购物车',
        			info: 0
        		}],
        	    buttonGroup: [{
        	      text: '加入购物车',
        	      backgroundColor: '#ff0000',
        	      color: '#fff'
        	    },
        	    {
        	      text: '立即购买',
        	      backgroundColor: '#ffa200',
        	      color: '#fff'
        	    }
        	    ]
				
			};
		},
    onLoad(option) {
      const goods_id = option.goods_id
      this.getGoodsDetail(goods_id)
    },
    methods: {
      ...mapMutations('m_cart',['addToCart']),
      async getGoodsDetail(goods_id) {
        const {data: res} = await uni.$http.get('/api/public/v1/goods/detail',{goods_id})
        if(res.meta.status !==200) return uni.$showMsg()
        
        res.message.goods_introduce = res.message.goods_introduce.replace(/<img /g, '<img style="display:block;" ').replace(/webp/g,'jpg')
        
        this.goods_info = res.message
      },
      
      preview(i) {
        uni.previewImage({
          current: i,
          urls: this.goods_info.pics.map(x => x.pics_big)
        })
      },
      
      onClick(e) {
        if(e.content.text === '购物车') {
          uni.switchTab({
            url: '/pages/cart/cart'
          })
        }
      },
      
      buttonClick(e) {
        if(e.content.text === '加入购物车') {
          // 2. 组织一个商品的信息对象
                const goods = {
                   goods_id: this.goods_info.goods_id,       // 商品的Id
                   goods_name: this.goods_info.goods_name,   // 商品的名称
                   goods_price: this.goods_info.goods_price, // 商品的价格
                   goods_count: 1,                           // 商品的数量
                   goods_small_logo: this.goods_info.goods_small_logo, // 商品的图片
                   goods_state: true                         // 商品的勾选状态
                }
                
                //调用addToCart方法
                this.addToCart(goods)
        }
      }
      
    }
	}
</script>

<style lang="scss">
swiper {
  height: 750rpx;
  
  image {
    height: 100%;
    width: 100%;
  }
}

.goods-info-box {
  padding: 10px;
  padding-right: 0;
  .price {
    color: #C00000;
    font-size: 18px;
    margin: 10px 0;
  }
  .goods-info-body {
    display: flex;
    justify-content: space-between;
    .goods-name {
      font-size: 13px;
      margin-right: 10px;
    }
    .favi {
      width: 120px;
      font-size: 12px;
      display: flex;
      flex-direction: column;
      align-items: center;
      justify-content: center;
      border-left: 1px solid #efefef;
      color: gray;
    }
    }
    .yf {
      font-size: 12px;
      color: gray;
      margin: 10px 0;
    }
}

.goods_nav {
  position: fixed;
  bottom: 0;
  left: 0;
  width: 100%;
}

.goods-detail-container {
  padding-bottom: 50px;
}
</style>
